Oil spill application on SNAP

[Ziyad]

Dears,

Can any one help me as I’m in the final phase of my research. I have worked on oil spill detection on Snap and reached the results ( attached below ). to examine my work I have used VNA to hit an oil spill and provide the Sigma0 readings. my question how can I get the sigma0 value from the Snap of an oil spill as shown below.

With many thanks in advance!!

oil_spill_detection_500_2_Sigma0_VV.bmp (1.5 MB)

[falahfakhri]

I think you could calibrate your image to sigma0,

Sentinel-1A GRD product

when you have calibrated the data and you already have Sigma0 you don’t need to select the “radiometric normalization” in the Terrain Correction module. Application of the orbit files is not mandatory but often improves the geometric accuracy of your product. It should be done at the very beginning. Orbit File Calibrate to Sigma0 Speckle Filter Terrain Correction Convert to dB

Radiometric & Geometric Correction Workflow

for SLC data I would suggest Calibration to Beta0 TOPSAR Deburst Apply Orbit file (Speckle filtering) Radiometric terrain flattening Range Doppler Terrain Correction If you don’t need the phase information you can also download it as a GRD product and only apply the following: Thermal noise removal Apply Orbit file Calibration to Beta0 (Speckle filtering) Radiometric terrain flattening Range Doppler Terrain Correction or (if you don’t have much topography): Thermal noise removal Apply Or…